Leopold f



L.F.GLAUDEf DRILL PRESS.

APPLICATION FILED SEPT. 24. I918.

1,317,285. Patented Sept. 30,1919.

moron) r. GLAUDE, or CHICAGO, ILLINOIS. 7

DRILL-PRESS.

To all whom it may concern: i i -Beit known thatI, Iinoronn F. GLAUDn, a citizen of the Uniter States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Drill- Presses, of which the following is a .specifi cation.

Themain objects of this invention are to provide an improved form of drill-press support particularly adapted for use in connection with breast drills whereby the latter may be more conveniently used onwo-rk for which the breast drill is not ordinarily suited, such for example as the drilling of holes where it is essential that the hole be drilledac'curately both as to locationand as to perpendicularity with respectto a surface; to provide-improved means whereby a support of this kind may be readily thrown into and out of'effective cooperative relation with a feed screw on the drill-press; and to provide iinproved'means for centering the work with respect to the axisof the drill. I

-'A specific embodiment of this invention is illustrated in the accompanying drawings, in which- Figure 1 is a perspective view of the improved drill-press support as applied to an ordinarybreast drill.

Fig. 2 illustrates a different form of workengaging or centering block suitable for use in connection i'viththe'support illustratediin Fig. 1.

Fig. 3 is an enlarged detail of one of the centering blocks shown in Fig. 1.

In the form shown in the drawings, the breast drill is of usual form, comprising a chuck 1 carried by a shaft 2 with operating mechanism therefor all mounted in a frame 3. A stock 4 is rigidly secured to the frame 3 in alinement with the drill shaft and carries a breast pad 5 at its upper end. A tubular feed screw 6 is rotatably mounted on the stock 4: and is confined between a boss 7 on the frame and a collar 8 on the stock. The screw 6 has a knurled head 9 whereby it maybe readily turned to raise or lower the drill.

The improved support comprises a base plate 10 to which are rigidly secured a pair of upright bars 11 which serve as Specification of Letters rat nt. P tented se tjO, Application filed September 24; 1918. Serial No. 255,489.-

guide. means for the drill-press and are connected thereto by means of cross-heads 12 and 13. The lower cross-head 12 is rigid on the drill-press frame 8 and maybe cast integrally therewith, said cross-head having sliding engagement with the upright bars 11,- so as to permit the frame 3 to be longitudi nally shifted with respect to said bars. The I upper cross-head. 13 has threaded connection with the feed screw 6 and may be fixed-with regard to the upright guide means 11 by means of set screws 14.

The base plate has anaperture 15 located i centrally between the'uprights ll'to permit the drill to extend through the base plate for engaging a piece of workbelow it.- For the purpose of enabling the-drill-press to be properly supported with respect to a .cylindrical piece of work, blocks 17 are provided which have V-shaped work-engaging seats 18 and 19 on their lower edges-andon their opposed side faces respectively, and their upper edges are shaped for slidably engag- I ing the base plate as shown in Fig.1. The V blocks 17 are adjustable toward and away from each other by means of the right and left threaded shaft screw 20. w

For the purpose of centering the drillpress with respect to the axis of atircular piece of work, the work-engaging seats 19 are used and the blocks 17 are drawn together so asto gripthework between'them; This is accomplished by means of the right and left threaded screw 20: Suitablemeans stiohas the annular shoulder 21 on the screw and lugs 22 on the base plate insure that a piece of circular work gripped between the blocks 17 will be exactly centered with respect to the drill. Removable flanges 23 are secured to theblocks 17 by screws 24:, the inner ends of said flanges extending beyond the shoulders 17 .1, so as to slidably engage the top surface of the base plate 10. The shaft screw 20 is of suflicient length to permit the blocks 17 to be removed from the base plate as a unit. The lowermost edges 28 of the blocks 17 are all in the same plane so that the device may stand upright on a flat surface. In practice, I prefer to make the shoulders 17.1 on the blocks 17 which engage the sides of the base plate 10, somewhat broader than they are shown in Fig. 1, so that the blocks will have longer bearing faces and will slide freely under the action of the screw 20, Fig. 1 was drawn slightly out of'proportion in this regard in order to more clearly show the shape of the worker;- gaging surfaces 18 and 19.

A modified form ofblock especially useful for supporting small rods orothercylindrical pieces of work of small diameter is shown at 25 in Fig. 2, this form of block beingadapted to be seated on top of the base plate with its V-shaped seat 26 facing upward and with a stud 27 on its under side for engaging the hole 15 of the base plate.

In operation, the base. plate 10 or the work-engaging blocks mounted'thereon are placed into engagement with the work and the drill is operated in the usual manner, 7 being advanced by means of the screw 6, or

with certain kinds of work Where it is dethe tapping of screw threads.

sired to advance the drill by pressure on the breast plate 5 alone-the set screws 14 are released so that the drill-press 'is free to slide along the guide rods 11. This feature is particularly useful in connection with Where great accuracy is desired, the base plate may be clamped tothe. work bymeans of an ordinary hand clampas illustrated in Fig. 1.

' head in a fixed position on said guide means,

- and afeed screw coacting with saidsecond cross-head. I I is r L 2. .The combination with a breast drill, of 1 .a support comprising a base plate having up- I right guide means mounted'thereon, means for supporting the breast drill on said guide means, said base plate being parallel-sided,

engaging the parallel sides of said base plate and relatively adjustable thereon, said blocks having V-shaped work-engaging faces and a pair of work-engaging blocks slidably for centering the work relative to the'drill,

and said base plate and blocks being adapt.- ed to permit the blocks to'be shifted apart until they are disengaged fro m said, base" a r 3. The combination With a breast drill, of j plate.

a support comprising a base plate having" upright guide means mounted thereon, means for slidably supporting the: breast drill on said guide means, said base vplate being parallel-sided, and apair of ,workengaging blocks slidably engaging the parallel sides of said base'plate and relatively adjustable thereon, said blocks having V- shaped work-engaging seats in, their op.-

to the drill.

4. The combination with a breast drill, of

a support comprising a base plate having upright guide means mounted thereon, means for slidably supporting the. breast drill on said guide means,'said base-plate being parallel-sided, and a pair of workengaging blocks slidably-engaging the par-. allel sides of said base plate and relatively adjustable thereon, said blocks having V- shaped work-engaging seats intheir opposed faces and in their bottom edges for centering the work relative tothedrill.

Signed at Chicago this 18th day of September, 1918. l

i LEOPOLD F. GLA D copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. V

7O posed faces for centering the work'relative v 

